#include <stdio.h>

void add(int a){
    int b = 20;
    const double PI = 3.14;
    int nums[] = {10, 20, 30};
    printf("(a+b+nums[0])*PI=%lf\n", (a+b+nums[0])*PI);
}

int main(){

    add(100);

    return 0;
}